Asian shares struggled to make gains on Tuesday as investors braced for key events later in the week, including the start of the US earnings season and a crucial Brexit summit, while broader concerns about slowing global growth checked sentiment, according to Reuters.

MSCI's broadest index of Asia-Pacific shares outside Japan was basically flat after brushing its highest since late August last year during the previous session, it said.

CIMB Retail Research said the FBM KLCI Index was up by 2.5 points or 0.15% on Monday, driven by the gains in crude oil prices as well as optimism about the ongoing US-China trade talks, which are likely to end in the next few weeks.

The research house said the market seems to need more impetus to push up the index.

"Further sideways consolidation may take place in the near term. As long as the reversal signal triggered by the Homing Pigeon remains valid, we are on the lookout for a technical rebound towards the 1,657-1,665 levels.